1 /*-
2  * Copyright (c) 1999, 2000 John D. Polstra.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28 
29 #ifndef RTLD_MACHDEP_H
30 #define RTLD_MACHDEP_H	1
31 
32 #include <sys/types.h>
33 #include <machine/atomic.h>
34 
35 struct Struct_Obj_Entry;
36 
37 /* Return the address of the .dynamic section in the dynamic linker. */
38 #define rtld_dynamic(obj)    (&_DYNAMIC)
39 
40 Elf_Addr reloc_jmpslot(Elf_Addr *where, Elf_Addr target,
41     const struct Struct_Obj_Entry *defobj, const struct Struct_Obj_Entry *obj,
42     const Elf_Rel *rel);
43 
44 #define make_function_pointer(def, defobj) \
45 	((defobj)->relocbase + (def)->st_value)
46 
47 #define call_initfini_pointer(obj, target) \
48 	(((InitFunc)(target))())
49 
50 #define call_init_pointer(obj, target) \
51 	(((InitArrFunc)(target))(main_argc, main_argv, environ))
52 
53 #define	call_ifunc_resolver(ptr) \
54 	(((Elf_Addr (*)(void))ptr)())
55 
56 /*
57  * Lazy binding entry point, called via PLT.
58  */
59 void _rtld_bind_start(void);
60 
61 /*
62  * PLT functions. Not really correct prototypes, but the
63  * symbol values are needed.
64  */
65 void _rtld_powerpc_pltlongresolve(void);
66 void _rtld_powerpc_pltresolve(void);
67 void _rtld_powerpc_pltcall(void);
68 
69 /*
70  * TLS
71  */
72 
73 #define TLS_TP_OFFSET	0x7000
74 #define TLS_DTV_OFFSET	0x8000
75 #define TLS_TCB_SIZE	8
76 
77 #define round(size, align) \
78     (((size) + (align) - 1) & ~((align) - 1))
79 #define calculate_first_tls_offset(size, align) \
80     round(8, align)
81 #define calculate_tls_offset(prev_offset, prev_size, size, align) \
82     round(prev_offset + prev_size, align)
83 #define calculate_tls_end(off, size)    ((off) + (size))
84 
85 typedef struct {
86 	unsigned long ti_module;
87 	unsigned long ti_offset;
88 } tls_index;
89 
90 extern void *__tls_get_addr(tls_index* ti);
91 
92 #define	RTLD_DEFAULT_STACK_PF_EXEC	PF_X
93 #define	RTLD_DEFAULT_STACK_EXEC		PROT_EXEC
94 
95 #define md_abi_variant_hook(x)
96 
97 #endif
98